Chair iron



Jujme w, 1923.

H. W. BOLENS CHAIR IRON Filed March. 14 1922 Harry WfinIerns III! Patented June 19, 1923.

PATENT OFFICE.

HARRY w. BOLENS, or roar WASHINGTON, WISCONSIN.

. CHAIR IRON.

Application filed March 14,1922. Serial No. 543,626.

T 0 all whom it may concern: I

Be it known that I, HARRY W. Burns, a citizen of the United States, and resident of Port'Washington, in the county of Ozaukee and State of Wisconsin, have invented certain new and useful Improvements in Chair Irons; and I do'hereby declare that the following is a full, clear, and exact description thereof. a

The invention relates to revolving chairs and has for an object the rovision of means for connecting the legs 0 such a chair. It pertains more particularly to im rovements in the invention on which atent No. 1,204,736 was granted to applicant on Nov. 14, 1916. I

Among the diversenovel features of improvement, is the combined top plate and spindle barrel structure. The topv plate is made of comparatively thin metal and has a central opening from which a flange is downwardly directed. An exterior peripheral flange is also provided and a standard is secured to the plate by means of tongues extending thru eyes therein. The standard has threaded relationship with a screw. The central flange is received within the spindle barrel which is recessed angularly adjacent its top'edge'.

An object of this structure is strength and durability. Itis able to withstand deforming stresses exerted in any direction. Tendency for the chair structure to create 2. lateral distortion is combated by the top plate structure which bears directly against the screw. Thearrangement of the flange in the recess prevents upward movement of the spindle barrel with respect to the top plate, prevents downward bending of the top plate and precludes all possibility 'ofangling, that is, of varyin the angle of the plane of the top plate with respect to the spindle barrel. The central flange on the plate has the effect of a reinforcing rib. and cooperates with the other fe'aturesjto eliminate any tendency of the plate to yield or be deformed immediately adjacent the central opening.

This structure in addition to the advantage of strength, is easy to manufacture, the

flanges being readily made. The parts are simple and may be assembled readily and the character of the various structural features is such that in addition to being durable, they make it possible to form the parts of comparatively thin and light material. The standard is conveniently secured to the plate and the resulting structure is strong. The peripheral flange prevents possibility of distortion of the plate by means of force exerted' on the standard.

An improved feature is the-channel strip structure. These strips are provided with a series of transverse deformations, which are made in the metal. This prevents tendency to collapse on vertical lines and avoids pos-' sibility of twisting action longitudinally. This feature is especially advantageous, in view of the strain exerted transversely of the chair legsreceived therebetween.

Another important feature of the inven tion is the manner of cooperation of the bottom plate with the spindle barrel. The

spindle barrel is cut away angularly adjacent its lower edge, thus forming a shoulder, and the bottom plate, which is cut away centrally, bears against this shoulder.

An object in the constructiom'like that of the top plate, is especial strength and durability. Tendency towards distortion of the spindle barrel laterally is, 'combated by the reinforcing action of the bottom plate, and upward movement of the plate with respect to the spindle barrel is prevented by the shoulder structure. An-

gling of the plate with respect to the spindle barrel is effectively prevented by the plate abutting against the wall ofthe barrel. In order for one end of the plate to move upwardly, it would be necessary that the entire spindle barrel should collapse adjacent its lower edge.

With the above and other objects in view which will appear as the description proceeds, my invention resides in" the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I have i1- lustrated one com lete example of the physical embodiment o the present invention con- V to the channel nel strips planes substantially axis of thescrew, exert a powerfulforce effectively preventing any tendency of the .screw to cause any deformations as there- ,sult of lateral movement. There can 'be'no 1 represents a'cap or top plate preferably circular in form and provided with a central barrel receiving aperture 2, the said plate being depressed about the aperture to form a flange 2. The plate is also provided with .four groups of socket apertures 3 for the reception of tongues 3, which tongues project from the upper edges of a series of-chan- 4c, to be hereinafter more fully described. -The top plate aperture2 is provided for the reception of one end ofa; spindle barrel 5, the upper edgeof which barrel is cut away to form an interioriannular recess receiving flange 2 against a shoulder 5', thestructure being such that the inner surface of the flange is continuous with the inner surface of the spindle barrel 5.4-The .lower end of the barrel 5 carries a bottom plate 6 which is provided with a central aperture 6; end of the barrel, the said end being exfor the reception of the lower tended thru the plate aperture, The-spindle barrel 5" is cutaway to provide anexterior annular. recess, terminated at. what is, sub-- stantially an annular shoulder 5? against which bottom plate-6 abuts. Y V r It is thus apparent that the bottom plate partakes of some of the advantages of structure of the top plate. Both of the platesand the spindle barrel are readily andco'nvenientlyassembled, and are simple. A chair screw is received within the spindle barrel :andany tendency thereof to-move laterally is prevented by the spindle barrel and the plates. It is'apparent that the plates which lie in at right, angles to the movement downwardly of the top plate 1 with respect to spindle barrel 5, and flange 2 cannot be bentnpwardly in any part thereof as it operates as a depending strengthening rib, Neither .the-top nor the spindle barrel. V

Leg members are fixed in positionrela-tive strips that. .fornrtheside walls of leg sockets A. .Thebottom plate issubstantially rectangular, but the corners are cut away to form tongues 8 thatengage central sockets-8 that are for-medadjacent to thelower ends of the channel'strip 4.

These strips have central portions in which a lurahty, of ribs 4 are formed, extending transversely and terminating in vwings' 4 which are integral with the central portion may be towards twisting being eliminated.

"From the foregoing, it will be seen that the channel strips which are spaced apart at regular intervals about the hub barrel, are confined by theirtongue and sockets-connections with the top. and bottom plates, and it is understood that these tongues, which :project thru the sockets, may be upset, riveted or spot welded, whereby :a permanent union is. effected.

' As is apparent in Figure 3, the radial distance from the spindle barrel to the channel strips is greater at the bottom than at the top. It is apparent, therefore, that after the; several members .have been asse mbled'and secured, the spaced strips form leg sockets which are slightly contracted :at their upper ends, whereby the legs, when driven into place, will be rigidly confined.

As shown in'F'igures 1 and top plate may be provided with suitable apertures .9 for the" reception of: anchor screws, not shown, whichare arranged to engage-the leg members in theusual manner.-

The top plate 1 is-providedwith, an: exterior depending flange 10,and is apertured, to receive tongues ll of standard 12, with which screw 13 has threaded relation It is apparent that forceexerted on standardy g 12 and tending to distort-plate-lwill be re sistedv somewhat by flange 10, whichoperates ,.'to' reinforce. the, plate.

It will be noted that spindle barrel 5 terminates-slightly below bottom plate 6. If it:-:.

were ,flushwith; a bottom face of thisplate,

possibility of the plate moving downwardly and free. from the spindle barrel wouldre- --sult.;

Iclairn: .1. vIn a cha r base hub, the combination of aspindle barrel having anannular recess adjacent its top edge, whereby ashoulder is formed on said barrel, a top plate havingl 2a;central dependingflange received in sa1 bottom plate may angle withrespect to the recess and abutting against said shoulder,

said top plate having a plurality of openings therein, a plurality of channel strips having angularly directed 'wings thereon and transversely extending ribs terminating in said wings, tongues on said strips secured 1n said openings and-means atthe-bottom .of saidstrips for securing said; strips (to said spindle barrel.

2.- In a chairbase hub, a channel strip 1' having a central portion, wings outwardly I extending therefrom and at a slight angle thereto, said central portion having transverse deformations therein, said wings being free from deformations throughout an entire longitudinal portion of each of said wings, said portion being immediately adjacent the side edges of said wings,

3. In a device of the class described, the

combination of a spindle barrel, a top plate secured thereto, a bottom plate secured to said spindle barrel, and a plurality of channel strips secured at their upper ends to said top plate and at their lower ends to said bottom plate, the upper ends of said channel strips being nearer to said spindle barrel than the lower ends are.

4:. In a device of the class described the combination of a spindle ba'rrel, a top plate secured thereto, a bottom plate secured to said spindle barrel and a plurality of channel strips secured at their upper ends to said top plate and at their lower ends to said bottom late, said channel strips having wings angularly and outwardly directed therehaving transverse corrugated ribs, said .channel strips being spaced apart to form slots forthe reception of legs, the said ribs imparting transverse strength to the channel strips whereby a strong-and rigid grip is maintained between the channel strips and the legs which are fitted within the slots. I

In testimony that I claim the foregoing I have hereunto set my hand at Port Washington, in the county of Ozaukee and State of Wisconsin. HARRY W. BOLENS. 

